.lijiduihuan-footer{
    .margin(100,0,0,0);
    width:100%;
    display:flex;
    justify-content: center;
    >span{
      background:#28a85a;
      .padding(36,205,36,205);
      .font-size(42);
      .border-radius(10);
      .margin(0,0,50,0);
      color:white;
    }
  }